Congrats on your progress so far!
Streaming on Twitch is actually pretty fun. It also allows you to make some really cool friends and sometimes join nice communities.
I have a suggestion that did work for me in the past and some friends of mine.
Networking is KEY here to get your name up there faster, and there's raiding communities out there that can help with that. You can meet lots of cool people through them.
I'll send you one that I personally used in the past through PM since I don't want to post them here.
Basically these guys have a Discord server and they do daily raids as a group on their community members. They usually pick the people by random or even suggestions from the ones in the raiding voice channel. Everyone can join.
I used to be with them years ago when I was streaming as well and I remember we would easily pump the numbers up on lots of streamers, me included.
Sadly I quit streaming due to some personal stupid reasons and laziness but I know it can help you.
Now, the usual question will arise. Will any of those people that join from the 5 minute raids stick? The answer is usually yes. You'll get some followers, sometimes even subs and if people like what you're streaming, they'll come in the future as well.